FreeCharge Weza: Batteries Not Necessary
Just step on the treadle, and you can create enough AC or DC energy to jump-start a car or boat, or charge an electronic device. Clearly, it's an ideal solution for emergency situations, both ordinary (car won't start in a desolate parking lot) and extraordinary (disaster relief, especially in developing regions). It's also compatible with solar panels and wind-powered turbines.
But if you plan on adding the FreeCharge Weza to your holiday gift list, you'll have to take a raincheck. The $300 device isn't scheduled to ship until next spring.